Segmented Cyclones in Fluidized Bed Coolers for Dust Separation
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Solution Overview
Problem
In fluidized bed coolers/heaters, fine dust particles are dispersed and carried away by the process gas, leading to dust loops and reduced energy efficiency, as existing single cyclone separators are large, expensive, and ineffective in separating fines.
Innovation Solution
Integrating multiple smaller cyclones into the cooler/heater to efficiently separate fine dust with minimal pressure loss, allowing for separate fluidization and temperature control in different regions, and using a common outlet leg with nozzles to prevent agglomeration and recycle particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a single cyclone separator is integrated into the cooler, then dust can be removed from the upstreaming fluidization gas, but the cyclone separator becomes large in size, expensive, and ineffective in separating fine particles
Solution Approach 1:
The invention divides a single large cyclone separator into multiple smaller cyclone separators that are integrated into the fluidized bed cooler. This segmentation allows each small cyclone to efficiently separate fine particles while maintaining a compact overall structure, resolving the contradiction between dust removal efficiency and cyclone size
2Object-generated harmful factors
If a single large cyclone separator is used, then dust removal is attempted, but separation performance decreases and pressure loss increases
Solution Approach 1:
By segmenting the dust separation function into multiple small cyclones, each cyclone operates at optimal velocity ratios that maximize separation efficiency for fine particles while minimizing pressure loss. The distributed configuration allows better gas flow distribution compared to a single large cyclone
3Productivity
If fine particles are not effectively separated, then dust loops form and energy efficiency decreases, but implementing effective separation with a single cyclone is not feasible
Solution Approach 1:
The invention merges the dust separation function directly into the fluidized bed cooler structure by integrating multiple small cyclone separators. This combination eliminates the need for separate large cyclone units while effectively preventing dust loop formation and improving energy efficiency through proper fine particle separation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents dust loop formation and enhances energy efficiency by effectively removing fine particles and allowing for varied retention times and temperature steps within the device.
Implementation Method 1
solid particles are fluidized in at least one fluidized bed with a fluidizing gas
Implementation Method 2
a number of cyclones integrated into said fluidized bed cooler/heater, said cyclones being arranged to separate fine particles from said upstreaming fluidization gas
Implementation Method 3
the fluidizing gas itself is the only heat transfer medium and cools or heats the solid particles
Data Source
AI summary
A device for cooling a fine-grained solid includes a fluidized bed cooler/heater in which the solid is fluidized with a fluidizing gas and thereby releases energy in the form of heat within the cooler/heater at least two cyclones which are connected in parallel. The cyclones are arranged such that after the fluidization of the solid the fluidizing gas passes through the cyclones so contained particles are removed.